Door lock



Jain-12, 1960 A. G. JOHNS DOOR LOCK Filed Aug. 27, 1956 M, Fake? 6.JOHN; 9

@{Harggg United States Patent 2,920,474 noon LOCK Avery G. Johns, DesMoines, Iowa Application August 27, 1956, Serial No. 606,237 4 Claims.(Cl. 70-451) This invention relates to a door lock and more particularlyto one that has .a common manually actuated locking mechanismselectively operable from each side of thedoor. Q a

Door. locks are very old. They usually take the form of a key actuatedbolt, with a keyhole at both sides of the door.' T o actuate the lockingmeans a key is inserted in the keyhole at one side of the door either tolock or unlock the door. Then the key is removed, the door used, andthen to lock or unlock the door, the key must inserted in the otherkeyhole and actuated. In case of poor lighting at either side of thedoor, this insertion of the key is most difiicult. Also time is lost inremoving the key from one keyhole and then inserting it in the keyholeon the other side of the door.

Therefore, one of the principal objects of my' invention is to provide adoor lock that eliminates the removal 'of the key means from one side of'the door to the other side of the door.

More specifically, the object of this invention is to provide a doorlock that may be rotated to bring the key means to either side of thedoor without necessitating the removal of the key.

A further object of this invention is to provide a door lock thatiscapable of being turned to a position where there is no keyhole at oneselected side of the doer.

: Still further objects of my invention are to provide a 1" door lockthat is economical in manufacture, durable in use, and refined inappearance.

These and other objects will be apparent to those skilled in the art. HMy'invention consists in the construction,"arra'ngements andcombination, of the various parts of the device, whereby the objectscontemplated are attained as hereinafter more fully set forth,specifically pointed out in my claims, and illustrated in theaccompanying drawings, in which:

Fig. 1 is a perspective view of my lock installed in a door,

Fig. 2 is a vertical sectional view of the lock with the keyhole on oneside only, and is taken on line 2-2 of Fig. 4,

Fig. 3 is a horizontal view of the device taken from a line 33 of Fig.4, and

Fig. 4 is a vertical sectional view of the lock taken from a linecorresponding to line 44 of Fig. 3, and more fully illustrates itsconstruction.

In these drawings I have used the numeral 10 to designate a door jamb orcasing frame in a building. The numeral 11 designates a door hinged inthe opening of the casing frame. The numeral 12 designates a horizontalwell in the casing frame for receiving a sliding bolt lock. In the door11 and adjacent the well 12 (when the door is in closed position) I cuta notch 13. Into this notch I secure a bearing frame 14 having ahorizontal Well 15 in its back for receiving a sliding bolt lock.

When the door is closed, the two wells 12 and 15 are opposed to eachother and extend in diametrically opposite directions.

The numeral 16 designates the lock frame housing having a bearing lug 17on its top rotatably mounted in the bearing frame, and a bearing lug 18on its bottom also rotatably mounted in the bearing frame. These twolugs 17 and 18 extend vertically, are opposed relative to each other,and horizontally rotatably secure the lock housing frame in the door, asshown in Fig. 4. While I show lugs 17 and 18, any other suitable meansor arrangement may be used to rotatably mount the housing frame in or tothe door. Slidably mounted in the housing frame are two opposed lockingbolt shafts 19 and 20. These two bolts 19 and 20 extend in oppositedirections and are adapted to selectively engage the Wells 12 and 15respectively. Any suitable throw means may be used to actuate thesebolts 19 and 20. In the drawings I show a cylinder lock 21 mounted inthe housing 16 and the rotatable plug of the cylinder lock isoperatively connected to the rear ends of the bolts 19 and 20, as shownin Fig. 4. I lay no claim to the specific mechanism inside the housinginasmuch as all such lock mechanisms are old. Such mechanisms aremanually operated by a handle knob key or like. When the plug of thecylinder lock 21 is rotated in one direction the two bolts will moveaway from each other and into the wells 12 and 15, and when rotated inthe opposite direction the bolts 19 and 20 will move toward each otherand from and out of the wells 12 and 15.

In the drawings I show a detachable key 22 to facilitate the rotation ofthe plug of the cylinder lock 21. In Fig. 1 and Fig. 2I show only onekeyhole plate 23 on one side only of the housing 16 and having a keyhole24 for receiving the key 22. The numeral 25 designates a plate on .theother side of the housing 16. g

The operation of the device is as followsz- In Fig. 1 the door is closedand locked. To pass through the door and lock it from the outside, a keyis placed in the keyhole 24-and rotated to withdraw the two bolts 19 and20, one then passes through the door,

rotating the housing 16 to bring the key to the outside the door, thekey is removed; Thus, to unlock the-door from one side, and then lock itfrom the other side, the key is only inserted and withdrawn once. Thebolts 19 and 20, however, will be reversed, i.c., the bolt that waspenetrating the well 12 will lastly penetrate the well 15. To unlock thedoor from the outside, the same procedure is followed, The key isinserted and the door unlocked and then the housing 16 is horizontallyrotated to bring the key to the inside of the door for locking the doorfrom the inside. With only one keyhole, as shown in Fig. 2, once one haslocked the door from the inside, there is no key hole on the outside ofthe door and therefore my device provides almost a burglar proof lock.In some instances, however, it will be desirable to have a keyhole ateach side of the housing, as shown in Fig. 3. In some installations onlyone bolt lock will be used. However, by using both bolts 19 and 20, thelock housing is held from rotation relative to the door by one of thebolts detachably engaging the well 15.

Some changes may be made in the construction and I I claim:

1. In combination, a door frame having a bolt lock receiving well, adoor hinged in said door frame having a bolt lock receiving well and anotch adjacent thereto, a lock housing having at least two oppositeportions of its periphery arcuate and rotatably mounted in the notch insaid door, two opposed slidable bolt lock shafts in said housing, ameans connecting said two bolt lock shafts whereby when one shaft isslid outwardly in one direction the other shaft will be moved outwardlyand when one of said shafts is moved inwardly in one direction the othershaft will be moved inwardly, and a means at one side of said housingoperatively connected to at least one of said two shafts for effectingthe sliding moving of both of said shafts; said lock housing beingmounted to rotate on an axis lying in a plane perpendicular to a planeparallel to the path of movement of the said slidable bolt lock shaftswhereby the said lock housing is capable of rotation when the slidablebolt lock shafts are retracted from the bolt lock receiving wells insaid door frame and said door; said lock housing capable of beingrotated to selectively bring either of said bolt lock shafts intoalignment with the well of said door frame or the well in said door.

2. In combination, a door frame having a bolt lock receiving well, adoor hinged in said door frame having a bolt lock receiving well and anotch adjacent thereto, a lock housing rotatably mounted in the notch insaid door, two opposed slidable bolt lock shafts in said housing, ameans connecting said two bolt lock shafts whereby when one shaft isslid outwardly in one direction the other shaft will be moved outwardlyand when one of said shafts is moved inwardly in one direction the othershaft will be moved inwardly, and a means at one side of said housingoperatively connected to at least one of said two shafts for eifectingthe sliding moving of both of said shafts; said lock housing beingmounted to rotate on an axis lying in a plane perpendicular to a planeparallel to the path of movement of the said slidable bolt lock shaftswhereby the said lock housing is capable of rotation when the slidablebolt lock shafts are retracted from the bolt lock receiving wells insaid door frame and said door; said lock housing capable of beingrotated to selectively bring either of said bolt lock shafts intoalignment with the well of said door frame or the well in said door.

3. In combination, a door frame having a bolt lock receiving well, adoor hinged in said door frame having a bolt lock receiving well, a lockhousing rotatably mounted in said door, two opposed slidable bolt lockshafts in said housing, a means connecting said two bolt lock shaftswhereby when one shaft is slid outwardly in one direction the othershaft will be moved outwardly and when one of said shafts is movedinwardly in one direction the other shaft will be moved inwardly, and akey actuated means at one side of said housing operatively connected toat least one of said two shafts for efiecting the sliding moving of bothof said shafts; said lock housing being mounted to rotate on an axislying in a plane perpendicular to a plane parallel to the path ofmovement of the said slidable bolt lock shafts whereby the said lockhousing is capable of rotation when the slidable bolt lock shafts areretracted from the bolt lock receiving wells in said door frame and saiddoor; said lock housing capable of being rotated to selectively bringeither of said bolt lock shafts into alignment with the well of saiddoor frame or the well in said door.

4. In combination, a door frame having a bolt lock receiving well, adoor hinged in said door frame, a lock frame rotatably mounted in saiddoor, a slidable bolt lock shaft means in said lock frame having twoopposed end portions capable of being selectively moved to bring eithersaid end portions into said well, and a means on one side of said lockframe for effecting the sliding of said bolt lock shaft means; said lockframe being mounted to rotate on an axis lying in a plane perpendicularto a plane parallel to the path of movement of said slidable bolt lockshaft means whereby the said lock frame is capable of rotation when theslidable bolt lock shaft is retracted from the bolt lock receiving wellin said door frame; said lock frame capable of being rotated toselectively bring either end of said bolt lock shaft means intoalignment with the Well of said door frame.

References Cited in the file of this patent UNITED STATES PATENTS202,511 Bendix Apr. 16, 1878 1,253,416 Nyary Jan. 15, 1918 1,436,925Wege et a1. Nov. 28, 1922 1,700,129 Hausmann Jan. 29, 1929 FOREIGNPATENTS 644,529 Great Britain Oct. 1-1, 1950

